RT Journal Article SR Electronic T1 A Biologically Based Measure of Emotional Engagement: Context Matters JF Journal of Advertising Research JO J Advert Res FD WARC SP 381 OP 387 DO 10.2501/S0021849906060466 VO 46 IS 4 A1 Carl D. Marci YR 2006 UL http://www.journalofadvertisingresearch.com/content/46/4/381.abstract AB The present study presents a biologically based measure of audience engagement. The measure is based on a neuroscience informed combination of signal processing methods that yield a continuous time-locked index of synchrony plus intensity leading to engagement from four noninvasive wireless biosensors. The study compared two television commercials in several different contexts. The results suggest that levels of engagement were significantly different depending on the context of the presentation. The results highlight the importance of context in study design and support the use of a biologically based measure of audience engagement.